Andes glaciers and ice caps outlines during the Little Ice Age (LIA)

This dataset comprises a shapefile of >5500 outlines of glaciers and ice caps during the Little Ice Age (LIA) approximately 1400 to 1850, spanning across the Andes from the equator to -60 degrees South. These outlines have been manually digitised by reshaping Randolph Glacier Inventory version 6 (RGI_v6) (https://doi.org/10.7265/4m1f-gd79) outlines to the extent interpreted to best represent the LIA. The LIA extent was deduced manually-visually by interpreting geomorphological evidence; primarily moraine crests and trimlines, within high-resolution aerial imagery; primarily WorldView and GeoEye. More methodological details and usage of this dataset for analysis of glacier area changes from the LIA to post year 2000 are presented in the parent paper: Carrivick et al., 2024. Accelerating glacier area loss across the Andes since the Little Ice Age. Geophysical Research Letters (submitted).

本数据集包含一份矢量形状文件（shapefile），收录了约公元1400年至1850年小冰期（Little Ice Age, LIA）时期的5500余条冰川与冰盖轮廓线，覆盖赤道至南纬60度的安第斯山脉全域。上述轮廓线系通过人工数字化手段得到：将兰多夫冰川清单第6版（Randolph Glacier Inventory version 6, RGI_v6，https://doi.org/10.7265/4m1f-gd79）的原始轮廓重新拟合，以匹配经解译得到的最能代表小冰期的冰川范围。小冰期的冰川范围系通过人工目视解译高分辨率航空影像中的地貌证据推导得出，其中地貌证据主要为冰碛垄脊与冰蚀削蚀线（trimline），影像数据主要取自WorldView与GeoEye卫星影像。有关本数据集的更多方法学细节，以及利用该数据集开展小冰期至2000年后冰川面积变化分析的相关内容，详见其配套研究论文：Carrivick等（2024）发表于《地球物理研究通讯》（Geophysical Research Letters，已投稿）的《自小冰期以来安第斯山脉冰川面积加速流失》一文。